STMicroelectronics STM32L063R8T7

Overview

STM32L063R8T7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 64 KB Flash, 8 KB SRAM, 2 KB EEPROM, integrated LCD driver, USB 2.0 (crystal-less), 12-bit ADC (1.14 Msps), and hardware AES-128 encryption-designed for battery-powered smart meters, portable medical sensors, and industrial IoT edge nodes requiring long runtime and secure firmware updates.

For engineers reviewing the STM32L063R8T7 datasheet, STM32L063R8T7 pinout, STM32L063R8T7 application, or STM32L063R8T7 equivalent, key selection considerations include its 0.27 µA standby current, 32 MHz max CPU frequency, 45 5V-tolerant I/Os, and dual ultra-low-power comparators with wake-up capability down to 1.65 V.

Technical Context

The STM32L063R8T7 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling across three power ranges (1.65–3.6 V) and enabling sub-µA low-power modes including Stop mode with RTC + 8 KB RAM retention (0.8 µA) and Standby mode with two wakeup pins (0.27 µA). Its clock system combines factory-trimmed 16 MHz HSI, self-calibrating 48 MHz HSI for USB, 32 kHz LSE for RTC, and PLL for CPU clock generation.

Analog subsystem includes a 12-bit ADC with up to 16 channels (1.14 Msps, operational down to 1.65 V), a 12-bit DAC with output buffer (down to 1.8 V), two ultra-low-power comparators with window mode and wake-up capability, and an on-chip temperature sensor with calibration data stored in system memory.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 fast I/Os (45 of which are 5V tolerant), including dedicated LCD segment/common pins, USB D+/D−, and multiple wakeup-capable GPIOs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L073RZT6, the STM32L063R8T7 offers lower cost and identical low-power behavior but less memory headroom; versus STM32L432KCU6, it trades raw compute for superior energy efficiency and integrated analog/LCD-making it optimal for simple, long-life sensor endpoints.

Availability

STM32L063R8T7 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32L063R8T7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The STM32L0 series targets ultra-low-power embedded applications where energy efficiency, security, and integration are critical-enabling battery-operated devices with decade-long operational life and robust firmware integrity.

FAQ

What is the maximum operating frequency and corresponding power supply range?

The STM32L063R8T7 achieves 32 MHz maximum CPU frequency within the 3.0–3.6 V supply range. At lower voltages (1.65–1.98 V), maximum frequency is reduced to 16 MHz per dynamic voltage scaling specifications. All frequency/voltage combinations are validated per DS10090 Rev 8 Section 6.3.1 and Table 3.

Does the device support USB without an external crystal?

Yes-the STM32L063R8T7 integrates a self-calibrating 48 MHz HSI oscillator synchronized to USB Start-of-Frame (SOF) tokens, enabling full-speed USB 2.0 communication without any external crystal or oscillator. This is confirmed in Section 3.20.5 and electrical characteristics Table 76 of DS10090 Rev 8.

How many I/O pins are 5V tolerant, and under what conditions?

45 of the 51 general-purpose I/Os are 5V tolerant when configured in input, analog, or alternate function modes-provided VDD is ≥ 2.0 V. This tolerance does not extend to output mode or open-drain configurations. Full details are specified in Section 6.3.13 and Table 58 of the datasheet.

Is the 2 KB EEPROM truly independent of Flash endurance limits?

Yes-the 2 KB data EEPROM is implemented as a separate memory array with dedicated ECC logic and endurance rated for 100,000 write/erase cycles and 20-year data retention at 55 °C, distinct from Flash memory's 10,000-cycle rating. This is documented in Section 3.8 and Table 52 of DS10090 Rev 8.